Regarding PRISM Break, I don't really recommend using it as basis to see whether some software is free/libre or not. Just add:
https://directory.fsf.org http://packages.trisquel.info/ https://www.gnu.org/software/guix/packages/ https://www.parabola.nu/packages/ http://archive.gnewsense.org/gnewsense/pool/ http://mirror.fsf.org/dragora/dragora-current/sources/ https://f-droid.org/repository/browse/ http://downloads.librecmc.org/sources/ http://files.proteanos.com/pub/proteanos/pool/ .. to your list of favorites, and you're set, some of these even have search bar integration to your browser (so you can add them to your search bar). PRISM Break isn't about software freedom, it's about security, and that's a secondary goal for free/libre software.
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